Image projection system for dome surface
CA 2278425 A1 · Owner: Kabushikigaisya Goto Kogaku Kenkyujyo · Inventors: Kasahara, Makoto; Ota, Hiromitsu; Miyazaki, Hidehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An image to be projected is deformed to obtain a projected image having small distortion. An image deforming device constituted by an optical fiber bundle is arranged in front of an original of a projector arranged at a position other than the center of a dome, so that the image of the original is transmitted from an end face on the incident side of an image correction device to an end face on the emission side as images divided into pixels using optical fibers as units. A secondary image subjected to predetermined deformation is displayed on the end face on the emission side, and the secondary image is projected on a dome surface to obtain a projected image which is free from distortion by …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.